PLATE 1 
EXPLANATION OF FIGURES 
1 Section of the germinal epithelium of a rabbit which had received eight 
intravenous injections of trypan blue. 
2 A binucleate mesothelial cell from the diaphragm of a rabbit which had 
received twelve intravenous injections of trypan blue. 
3 and 4 Mesothelial cells from the spleen of a rabbit which had received 
ten intravenous injections of trypan blue. 
5 <A mesothelial cell from the omentum of a rabbit which had received six 
intravenous injections of trypan blue. 
6 A mesothelial cell from the spleen of a rabbit which had received twelve 
intravenous injections of carmine. 
7 A mesothelial cell from the spleen of a rabbit which had received eighteen 
intravenous injections of carmine. 
8 Mesothelial cells from the diaphragm of a rabbit which had received twenty- 
five intravenous injections of carmine. 
426 
